package com.coolweather.android;


import static com.coolweather.android.constants.Constants.PROVINCE_URL;

import android.app.ProgressDialog;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ProgressBar;
import android.widget.Toast;

import androidx.fragment.app.Fragment;

import com.coolweather.android.constants.Constants;
import com.coolweather.android.databinding.ChooseAreaBinding;
import com.coolweather.android.db.City;
import com.coolweather.android.db.County;
import com.coolweather.android.db.Province;
import com.coolweather.android.util.HttpUtil;
import com.coolweather.android.util.Utility;

import org.jetbrains.annotations.NotNull;
import org.litepal.LitePal;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import okhttp3.Call;
import okhttp3.Callback;
import okhttp3.Response;

public class ChooseAreaFragment extends Fragment {

    public static final int LEVEL_PROVINCE = 0;//省级
    public static final int LEVEL_CITY = 1;//市级
    public static final int LEVEL_COUNTY = 2;//县级
    public static final String PROVINCE = "province";
    public static final String CITY = "city";
    public static final String COUNTY = "county";
    private int currentLevel = LEVEL_PROVINCE;//当前显示的省级列表 currentLevel=0;

    List<Province> provinceList;//省的集合数据
    List<City> cityList;//市的集合数据
    List<County> countyList;//县的集合数据

    private Province selectedProvince;
    private City selectedCity;

    List<String> dataList = new ArrayList<>();//存放省份名称列表、市名称列表、县名称列表 与列表适配器配合使用
    ArrayAdapter<String> adapter;

    ProgressDialog progressDialog;//加载进度对话框


    ChooseAreaBinding binding;

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState){
        binding= ChooseAreaBinding.inflate(inflater,container,false);

        //适配器的初始化
        adapter=new ArrayAdapter<>(getActivity(), android.R.layout.simple_list_item_1,dataList);

        //为列表组件设置适配器
        binding.listView.setAdapter(adapter);

        return binding.getRoot();
    }

    @Override
    public void onActivityCreated(Bundle savedInstsnceState){
        super.onActivityCreated(savedInstsnceState);

        //绑定列表项的点击事件
        binding.listView.setOnItemClickListener((adapterView, view, position, id) -> {
           if (currentLevel==LEVEL_PROVINCE){
               selectedProvince= provinceList.get(position);//获取选中项
               queryCities();//查询城市
           }else if(currentLevel==LEVEL_CITY){
               selectedCity=cityList.get(position);
               queryCounties();
           }else if (currentLevel==LEVEL_COUNTY){
               //把当前位置和weatherId传过去   CNXXXX ---->XXXX
               County county = countyList.get(position);
               String spot=String.format("%s|%s|%s",
               selectedProvince.getProvinceName(),
               selectedCity.getCityName(),
                       county.getCountyName());
               String location= county.getWeatherId().substring(2);
               Log.d("test", "onActivityCreated: "+spot+"|"+location);

               Intent intent = new Intent(getActivity(),WeatherActivity.class);
               intent.putExtra("spot",spot);
               intent.putExtra("location",location);
               startActivity(intent);
               getActivity().finish();
           }
        });

        binding.backButton.setOnClickListener(v->{
            if(currentLevel==LEVEL_CITY){
                queryProvinces();
            }else if (currentLevel==LEVEL_COUNTY){
                queryCities();
            }
        });

        queryProvinces();//查询省份
    }

    private void queryCities() {
        binding.titleText.setText(selectedProvince.getProvinceName());
        binding.backButton.setVisibility(View.VISIBLE);

        //访问数据库表
        cityList = LitePal.where("provinceId=?",
                String.valueOf(selectedProvince.getId())).find(City.class);

        if (cityList.size()>0){
            //成功从数据库中获取数据
            dataList.clear();//消除原来的数据
            cityList.forEach(item->{
                dataList.add(item.getCityName());
            });
            adapter.notifyDataSetChanged();
            binding.listView.setSelection(0);
            currentLevel = LEVEL_CITY;
        }else {
            //数据库是空表，发网络请求，获取数据，填充数据
            String url = PROVINCE_URL+"/"+selectedProvince.getProvinceCode();
            queryFromServer(url, CITY);
        }
    }

    private void queryProvinces() {
        //尝试从本地SQLLITE3数据库中访问省份表，尝试获取省份列表数据
        binding.titleText.setText("中国（China）");
        binding.backButton.setVisibility(View.GONE);

        //访问数据库表
        provinceList = LitePal.findAll(Province.class);
        if (provinceList.size()>0){
            //成功从数据库中获取数据
            dataList.clear();//消除原来的数据
            provinceList.forEach(item->{
                dataList.add(item.getProvinceName());
            });
            adapter.notifyDataSetChanged();
            binding.listView.setSelection(0);
            currentLevel = LEVEL_PROVINCE;
        }else {
            //数据库是空表，发网络请求，获取数据，填充数据
            queryFromServer(PROVINCE_URL, PROVINCE);
        }
    }

    private void queryCounties() {
        binding.titleText.setText(selectedProvince.getProvinceName()+"·"+selectedCity.getCityName());

        binding.backButton.setVisibility(View.VISIBLE);

        //访问数据库表
        countyList = LitePal.where("cityId=?",
                String.valueOf(selectedCity.getId())).find(County.class);

        if (countyList.size()>0){
            //成功从数据库中获取数据
            dataList.clear();//消除原来的数据
            countyList.forEach(item->{
                dataList.add(item.getCountyName());
            });
            adapter.notifyDataSetChanged();
            binding.listView.setSelection(0);
            currentLevel = LEVEL_COUNTY;
        }else {
            int provinceCode = selectedProvince.getProvinceCode();
            int cityCode = selectedCity.getCityCode();
            String url="http://guolin.tech/api/china/"+provinceCode+"/"+cityCode;
            queryFromServer(url, COUNTY);
        }
    }
    /**
     *
     * @param url 网络访问请求地址
     * @param  type  类型 province
     */
    private void queryFromServer(String url,String type){
        showProgressDialog();//显示加载进度条
        HttpUtil.sendOkHttpRequest(url, new Callback() {
            @Override
            public void onFailure(@NotNull Call call, @NotNull IOException e) {
                getActivity().runOnUiThread(()->{
                    Toast.makeText(getContext(), "访问网络失败", Toast.LENGTH_SHORT).show();
                    closeProgressDialog();
                });
            }

            @Override
            public void onResponse(@NotNull Call call, @NotNull Response response) throws IOException {
            //解析数据 放在子线程中
               String strJson = response.body().string();
                boolean result=false;
               if (PROVINCE.equals(type)){
                   result = Utility.handleProvinceResponse(strJson);
               }else if (CITY.equals(type)){
                   result = Utility.handleCityResponse(strJson,selectedProvince.getId());
               }else if(COUNTY.equals(type)){
                   result = Utility.handleCountyResponse(strJson,selectedCity.getId());
               }
               if (result){
                   if (PROVINCE.equals(type)){
                       getActivity().runOnUiThread(()->{
                           queryProvinces();
                       });
                   }else if (CITY.equals(type)){
                       getActivity().runOnUiThread(()->{
                           queryCities();
                       });
                   }else if (COUNTY.equals(type)){
                       getActivity().runOnUiThread(()->{
                           queryCounties();
                       });
                   }
                   closeProgressDialog();
               }else{
                   getActivity().runOnUiThread(()->{
                       getActivity().runOnUiThread(()->{
                           Toast.makeText(getContext(),
                                   "数据解析失败",Toast.LENGTH_SHORT).show();
                           closeProgressDialog();
                       });
                   });
               }
                //显示数据（再次使用queryProvinces()）
            }
        });
    }

    private void closeProgressDialog() {
        if (progressDialog!=null){
            progressDialog.dismiss();
        }
    }

    private void showProgressDialog() {
        if (progressDialog==null){
            progressDialog = new ProgressDialog(getContext());
            progressDialog.setMessage("正在访问网络，请稍后！");
            progressDialog.setCancelable(false);
        }
        progressDialog.show();
    }


}
